US3755522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trim in place differential pressure thermoforming process
Assignee: Monsanto Co
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Filing: 1971-10-01
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Granted: 1973-08-28
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Expires: 1991-10-01
Abstract
Abstract Method for trim in place thermoforming of articles from successive portions of a continuous sheet. Each sheet portion is sealed and a rounded flange formed therein prior to forming the container by advancing a rounded mold portion into an opposing resilient surface with the sheet interposed therebetween, while simultaneously substantially separating each sheet portion from the remainder of the sheet. Separating is by means of a blade which preferably is heated and has depressions in it surface to prevent completely separating each portion from the sheet. The blade may optionally operate against another opposing resilient surface.
Inventors
- 👤 B Jope
- 👤 A Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:17
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/08; B29C51/082; B29C51/085; B29C51/26; B29C51/30; B29C51/32; Y; Y10; Y10S; Y10S425/00; Y10S425/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |